I have split the descriptive data of the the 'Dao.Evaluator.ExecControl' structure off into it's own data structure 'Dao.Evaluator.ExecErrorInfo'. This makes it easier to update the information in an error report.
I am getting ready to do some major clean-up, some of this code has long been forgotten and no longer does anything. In this commit, I have moved an old unused data structure into an old unused file.